DE102009011524A1 - Electric energy storage cell and cell block, electric energy storage device and vehicle with it - Google Patents

Abstract

An electric power storage cell is provided with an active part configured and adapted to store externally supplied electric power and to output stored electric power to the outside; at least two current conductors connected to the active part and adapted and adapted for supplying electric power from the outside to the active part and for outputting electric current discharged from the active part to the outside; and a cladding defining a prismatic basic shape of substantially parallelepiped outline and enveloping the active portion in a gas and liquid tight manner. According to the invention, the sheath comprises two flat foil parts and a peripheral seam part connecting the edges of the foil parts, wherein the seam part surrounds the active part like a frame and has sections of greatest thickness, in which the thickness is uniformly greater than the thickness of the active part. A cell block consists of a plurality of these electric energy storage cells, wherein the cells are stacked in the direction of their thickness, and together with terminal poles forms an electric energy storage device, which is advantageously usable in a vehicle.

Description

The The present invention relates to an electric energy storage cell and a cell block consisting of a plurality of each other interconnected electric energy storage cells, an electric energy storage device with a cell block and a vehicle equipped therewith.

It are batteries (primary storage) and accumulators (secondary storage) known for storing electrical energy consisting of one or more Memory cells are constructed, in which when applying a charging current electrical energy in an electrochemical charging reaction between a cathode and an anode in or between an electrolyte converted into chemical energy and thus stored and in which when applying an electrical consumer chemical energy in an electrochemical discharge reaction into electrical energy is converted. This primary storage are usually charged only once and are to be disposed of after discharge while Secondary storage multiple (from some 100 to over 10000) Allow cycles of charging and discharging. It should be noted that also accumulators are sometimes called batteries, such as vehicle batteries, which are known to be frequent charging cycles experience.

In In recent years, primary and secondary storage is gaining on the basis of lithium compounds in importance. These wise a high energy density and thermal stability, deliver a constant voltage with low self discharge and are free of the so-called memory effect.

It is known to produce energy storage and in particular lithium batteries and accumulators in the form of thin plates. The script "Primary and Rechargeable Lithium Batteries" for the practical course Inorganic-Chemical Technology of Graz University of Technology by Dr. med. K. -C Moeller and dr. M. Winter from February 2005 shows z. B. lithium-ion polymer cells in the format of a check card or even a smart card. For the functional principle of a lithium-ion cell reference is made by way of example to this script. In such cells, cathode and anode material, current collectors and separators in the form of thin films are suitably stacked and packaged in an envelope of composite material, with current conductors connected to the current collector foils of the cathode and the anode, respectively Edge of the cell protrude laterally.

By changing the number of anode and cathode pairs, the capacity of such a cell can be adjusted as needed, such as from EP 1 475 852 A1 known. There, the ends of the current collecting foils are combined within the enveloping film and connected by connecting means such as rivets, which extend perpendicularly through the cladding film, with a rod-shaped current collector resting on the outside of the cladding foil. The external current collector then protrude again at an edge of the flat cell.

In the EP 1 562 242 A2 a rod-shaped current conductor is also provided which is separated from the ends of the current collecting foils, but which is already connected within the covering foil to the ends of the current collecting foils and is led out again through the weld seam of the enveloping foil. The rod-shaped current conductors protrude either at one edge or at opposite edges of the flat cell.

If several flat cells are stacked to form a cell stack, as is regularly required, for example, in automobile batteries due to higher voltages and capacities, the interconnection of the individual cells is usually carried out at the top, as exemplified in US Pat WO 2008/128764 A1 or the JP 07-282841 A is described. 14 shows an arrangement of several flat, cuboid or plate-shaped single cells 102 after WO 2008/128764 A1 in a cell stack 101 , From anode A and cathode K of a cell 102 projects on opposite lateral sides in each case a contact lug 103.A . 103.K on the same flat side from the same, upper edge (narrow side) of the cell upwards. Here is the cathode contact lug 103.K every cell 102 just while the anode contact banner 103.A every cell 102 bent, and about (probably a little more than) the thickness of each cell 102 , In the cell stack 101 follows one cell each 102 in which the anode A is located on the right and the cathode K on the left, on a cell 102 in which the anode A is located on the left and the cathode K on the right. In this way, a (curved) anode contact lug will come into effect without any further action 103.A with a (straight) cathode contact lug 103.K in contact or at least in their vicinity, so that they can be connected with each other. In this way, a series connection is realized. The cells 102 are arranged at a distance from each other and non-positively or positively on a base plate 105 attached.

The arrangement and mounting on the base plate 105 requires careful alignment and reliable fixation. Dismantling the cells requires solving individual cells one at a time 102 , It is only a determination of the cells provided in the lower area, so that when exposed to accelerations or vibrations, the joints between the upper lobes due to the inertia and elasticity of the cells 102 are formed, mechanical loads can be set, resulting in only slightly loose fixation on the base plate 105 exacerbated. The contact surface of the contact lugs 103.A . 103.K is relatively small.

Out an unpublished development it is known several thin, rectangular galvanic cells so to one or more stacks summarize their pages largest extent facing each other or touch, and are poured into a holding device. Such an arrangement is not removable.

It The inventors also a printed by not closer occupied arrangement known in which several flat cells between two end plates are stacked, the stack by tie rods (bolts), which extend between the end plates, are held together. This is not insignificant pressure on the lying in the inner area active part of the memory cells exercised.

It is therefore an object of the present invention, a flat electric energy storage cell and to create a cell block consisting of several such cells, which offer an alternative to known types and in particular avoid the disadvantages of these designs.

It is in particular an object of the invention, a flat electric energy storage cell form so that when forming a block a secure position fixation the cells with each other is possible.

It It is another object of the invention to provide a flat electric energy storage cell form so that a block formed from these as compact as possible is, without the active areas of a compressive stress exposed are.

The The object is achieved by the features of the independent claims 1 and 25 solved. Advantageous developments of the invention form the subject of the dependent claims.

A Electric energy storage cell of the present invention has a active part, which is furnished and adapted, from the outside to store and store supplied electrical energy to release electrical energy to the outside; at least two Current arresters connected to the active part and to the feeder electric current from the outside to the active part and to Dispensing of the active part of the emitted electrical current to the outside are furnished and adapted; and a serving, which a prismatic basic shape of substantially cuboidal Outline describes and the active part gas and liquid tight wrapped up, up. The envelope has two flat Film parts and a circumferential, the edges of the film parts connecting seam part, wherein the seam part, the active part like a frame surrounds and has sections of greatest thickness, in which the thickness even under mechanical pressure uniform greater than the thickness of the active part.

One such structure allows electric power storage cells (hereafter "cells") to be stacked so that at the sections of greatest thickness of the seam abut each other without any mechanical action on the active part is exercised. With suitable material selection for the film parts and the seam part as well as the connection method between the film parts and the seam part it is also possible the active part against the influence of electromagnetic fields shield and the envelope resistant to perform in the active part existing and / or generated substances.

Preferably The two parts of the film are the largest, at least in the sections Thickness on opposite flat sides of the seam flat on and are closely connected with these. To this Way it is guaranteed that the foil parts in two parallel planes are spanned and thus flat sides of the prismatic Form basic form.

at A cell block formed from such cells are the cells stacked in the direction of their thickness and are preferably at least in areas that are the areas of greatest thickness of the seam correspond to each other. The cells are in Stacking direction preferably clamped together under pressure. It is such a compact and safe arrangement and assembly of the individual cells possible without putting pressure on the active part of each cell is exercised.

Preferably the seam part has through-holes running in the thickness direction in sections of greatest thickness and have the Foliateile with the through holes aligned holes. In a cell block made up of such cells, the tension can the cells are carried out by means of tension rods, which pass through the Through holes extend through all cells. On this way, a particularly simple and compact construction of the Cell blocks allows for the volume of cells for the tension is used. The cells are at least one another fixed in position stable by friction. About the tension rods can in conjunction with the through holes centering the cells are perpendicular to the stacking direction, even before the Cells are clamped together. This facilitates the assembly and prevents tension during assembly.

Particularly preferred are sleeves vorgese hen, which extend over a part of the length of the through holes in each of these and projecting from one side of the seam part, preferably the projection of the sleeves and the length left in the through holes greater than the combined thickness of the films and less than half of greatest thickness of the seam plus the thickness of one of the foils. In assembling such cells into a cell block, each of a cell-protruding part of a sleeve extends into the exposed part of a through-hole of the suture part of an adjacent cell. In this way, a centering of the cells is already achieved perpendicular to the stacking direction during assembly before the tension rods are inserted and clamped. The tie rods extend through the sleeves and thus experience a reliable leadership.

alternative the seam part can have protruding elevations in the thickness direction, being on the opposite side of a survey one corresponding to the survey in shape and size and provided with this in the thickness direction aligned recess is, and have the foil parts with the elevations or depressions aligned holes of appropriate shape and expansion, preferably the height of the elevations and the depth of the Depressions larger than the taken together Thickness of the foils and less than half of the largest Thickness of the seam plus the thickness of one of the foils. At the Assembly of such cells to a cell block extends each one elevation of the suture of a cell in a depression of the Seam of an adjacent cell. In this way, when assembling the cells reaches a centering perpendicular to the stacking direction.

additionally to the elevations and depressions, the seam part in the thickness direction running through holes in sections of greatest thickness and can the film parts with the through holes have aligned holes, wherein the through holes preferably provided centrally in alignment with the elevations or depressions are. In this way, a tension of several cells to one Cell block in the manner explained above reliable, Space-saving and easy to be accomplished by the tension rods extending through the through holes.

The Current conductors of the cells preferably have a flat profile and stand out from the serving. With flat profiled, protruding current conductors is a via contact of the cells within a cell block particularly easy in the way possible, that each a current conductor of a cell with a current collector a neighboring cell is connected and, as far as the cell is not the first or last cell of the cell block is the other current conductor the cell with a current collector of another adjacent cell connected is.

If always current conductors of different polarity with each other are connected in a particularly simple manner, a series circuit of the cells in the cell block.

The Current arresters preferably protrude parallel to the flat sides of the from the envelope defined prismatic basic shape and most preferably extend adjacent to one another Flat sides of the envelope defined by the prismatic Basic form. Are such cells grouped together in a cell block or stacked, these are preferably arranged so that always Current arrester on the flat side, to which they are adjacent, in the stacking direction of the cell block opposite. As a result, the current conductor to be connected are adjacent cells each other always with the smallest axial distance across and can easily through Clamps or other appropriate measures in contact with each other to be brought.

there Can the current collector from opposite Narrow sides of the prismatic areas defined by the cladding Basic form or alternatively protrude from the same narrow side. Furthermore, the prismatic structure can have four equally long narrow sides have, d. H. in a section transverse to the stacking direction or corner direction square, or two opposite Having pairs of narrow sides of different lengths, wherein the current conductors of the longer pair or of the shorter one Protect pair of narrow sides. The final choice is directed according to the installation conditions; Currently, it is preferred that the current collector from opposite narrow sides of the casing defined prismatic basic form and of the longer Protect pair of narrow sides.

Preferably is the extension of the first and second current conductors along the narrow sides from which they protrude larger as half the length of these narrow sides. In this way the contact area between current conductors is especially large and thus the contact resistance advantageous small.

Especially Preferably, the current conductors each extend between the Seam part and one of the foils through and are sealed with these connected. It can be so within the active part of the cell arranged electrodes within the enclosure with the Current conductors are connected and so sealing problems with plated-through, external current conductors are avoided.

Especially The current conductors preferably have an L-shaped profile on, one leg of a narrow side of the active part abuts and the other leg is between the seam part and one of the foils extends therethrough. Through the L-profile is the Narrow side of the active part defined and stabilized, and this Narrow side can be so without affecting the active part to the inside of the frame shape of the seam.

If the seam part additionally in shape and size the current conductors adapted notches, a can smooth outer contour of the flat sides are ensured.

The The present invention is particularly preferred, but not exclusively on galvanic cells, in particular apply galvanic secondary cells of the flat type, at which the active part of a laminated film package of chemical active materials of two types, electrically conductive materials and separating layers, possibly impregnated with an electrolyte material, consists. The chemically active material of the at least one kind preferably has a lithium compound, and the chemically active material of another type preferably has graphite. Especially preferred The active part is evacuated to prevent unwanted reactions avoid.

Becomes a free current collector of the first cell in a cell block with connected to a terminal pole and a free current conductor of the last Cell in the cell block connected to another terminal pole, For example, the cell block is advantageous as an electric energy storage device available.

Especially advantageous is such an electric energy storage device used in a vehicle.

The The foregoing and other features, objects, and advantages of the present invention Invention will be apparent ersicht Lich from the following description be that with reference to the attached drawings was made.

In the drawings:

is 1 an exploded perspective view of parts or assemblies of a galvanic cell according to an embodiment of the present invention;

shows 2A a section of a frame part along a plane II in 1 ;

shows 2 B a section of an active part along the plane II in 1 ;

shows 3 a section of the frame part along a plane III in 1 ;

is 4 a perspective view of a galvanic cell according to a second embodiment of the present invention in the assembled state;

is 5 an exploded perspective view of parts or assemblies of a cell block according to a third embodiment of the present invention;

is 6 an enlarged view of some assemblies of the cell block of 5 from another perspective;

is 7 a perspective view of the cell block of 5 in the assembled state;

is 8th an enlarged view of a detail VIII in 7 ;

shows 9 a top narrow side of a galvanic cell according to a fourth embodiment of the present invention in perspective view;

shows 10 a top narrow side of a galvanic cell according to a fifth embodiment of the present invention in a perspective view;

is 11 a perspective view of an electrical assembly of a galvanic cell according to a sixth embodiment;

shows 12 a top narrow side of a galvanic cell according to an eighth embodiment of the present invention in perspective view;

shows 13 a section of a frame part in an eighth embodiment of the invention, wherein the representation of an upper part of the illustration in 3 corresponds; and

shows 14 a cell block according to the prior art.

It It should be noted that the illustrations in the figures are schematic are and are on the reproduction of for understanding restrict the invention most important features. Also is on it to indicate that the reproduced in the figures dimensions and proportions alone of clarity the presentation are owed and in no way limiting to be understood.

As an embodiment of the present invention, a galvanic cell will be described below with reference to FIG 1 to 3 described. It is 1 an exploded perspective view of parts or assemblies of a galvanic cell 1 , and shows 2a a section of a frame part along a plane II in 1 , shows 2 B a section of an active part along the plane II in 2 , shows 3 a section of the frame part along a plane III in 1 , The galvanic cell 1 is an electric energy storage cell according to the invention.

As shown in 1 is the galvanic cell 1 from an electrical assembly 2 , a frame part 4 and two cover sheets 6 assembled, wherein the electrical assembly is a foil package 8th , an anode conductor 10 and a cathode conductor 12 having. For orientation, an axbox is indicated in the figure, whose origin arbitrarily in the center of the front cover sheet 6 is defined. A lateral direction of the cell 1 is defined by the central axis in the transverse direction A, a vertical axis of the cell 1 is defined by the center axis in the high direction B, and the axial direction of the cell, which is the thickness direction of the cell at the same time, is defined by the central axis C in the longitudinal direction. All axes are shown in thin dot-dash lines. The positive direction is indicated by an arrow.

As can be seen in the figure, the film package 8th a substantially plate-shaped contour and the extension in the lateral direction (A) is greater than the extension in the vertical direction (B). The anode conductor 10 is made of a good conductor material and has an L-shaped cross-section. The short leg of the L-profile of the anode conductor 10 is on the upper narrow side of the foil package 8th appropriate. Equally, the cathode arrester 12 made of a good conductor material and has an L-shaped cross section, and is the short leg of the L-profile of the cathode arrester on the lower narrow side of the film package 8th appropriate. Thus, the long leg of the Anodenableiters extends 10 in alignment with the front flat side of the film package 8th upward (positive direction B) and extends the long leg of Kathodenableiters 12 in alignment with the rear flat side of the film package 8th down (negative direction B). On the side facing away from the film package in the thickness direction, the long legs of the L-profile of the anode conductor and the cathode conductor each carry a strip of a sealing film 14 for connection to the front or rear cover foil 6 , It should be noted that the foil package 8th forms an active part of the cell according to the invention. For the current collector 10 . 12 will be selected from the known materials such as copper, aluminum or other metals or alloys thereof. To improve the contact (reduction of contact resistance) and / or to prevent corrosion, the current collector 10 . 12 be silvered or gilded.

The frame part 4 has two vertical bars 16 and two horizontal bars 18 which form a one-piece frame. The inner contour of the frame is the outer contour of the film package 8th customized. The upper horizontal bar 18 has a notch in cross-section L-shaped 20 its thickness on the inside and on the front cover sheet 6 side (positive direction C) is reduced. The lower horizontal bar 18 has a notch 20 which reduces its thickness on the inside and on the side facing the back cover sheet (negative direction C). The shape of the notches 20 is sized to match the L profile of the anode conductor 10 and the cathode conductor 12 receives.

It should be noted that the frame part 4 a suture within the meaning of the invention and those portions of the vertical bars 16 and the horizontal bars 18 of the frame part 4 that does not have a notch 20 wear, sections are the largest thickness in the meaning of the invention. The material of the frame part 4 is electrically non-conductive and has a sufficient compressive stiffness, so that even under axial pressure (in the direction of the axis C), the sections of greatest thickness still thicker than the electrical assembly 2 are and the frame part 4 maintains its shape stable. The materials offered are various plastics, ceramics and technical glasses.

On the front flat side (positive direction C) carries the frame part 4 in the sections largest thickness centering nipple 20 with centering holes 24 in the cover sheets 6 aligned. For clarity, in the figure, axes F, F 'are the centering nipples 22 and centering holes 24 on the left side of the cell 1 (negative direction A) shown. In 2A and 2 B are the frame part 4 or the electrical assembly 2 shown in section along a plane II, which is spanned by the axes B and C (vertical center plane in the axial direction). As shown, the frame part 4 in its largest thickness sections, has a thickness T that is greater than a thickness t of the electrical assembly 2 , in particular of the film package 8th the same. In 2 B is in the area of the film package 8th the structure shown schematically such that current collector foils an anode side (anode conductor foils) 26 with the anode conductor 10 are connected and in alternation with current collector foils of a cathode side (cathode conductor foils) 28 are arranged, in turn, with the Kathodenableiter 12 are connected. Intermediate foils of a chemically active material of the anode and cathode side and Separatorfolien within the film stack 8th are omitted in the figure for clarity.

3 shows a section of the frame part 4 along a level III in 1 , which is parallel to the plane II and through the two left centering holes 24 and centering nipple 22 runs (see axes F, F ', E in 1 ). The cut passes by definition through the left vertical bar 16 of the frame part 4 , but an upper and lower area arbitrarily also the respective horizontal bar 18 could be assigned. As can be seen, runs in alignment with the centering nipples 22 one through hole each 30 and is on the center nipples 22 opposite flat side of the frame part 4 one depression each 32 provided, which is dimensioned so that they the centering nipple 22 could take up.

To assemble the cell 1 (see. 1 ) becomes the electrical assembly 2 so in the frame part 4 used that the L-profiles of the anode conductor 10 and the cathode conductor 12 in the notches 20 of the frame part 4 to sit. It can be seen that for this purpose the electrical assembly 2 and the frame part 4 first have to be tilted against each other, such as the Kathodenableiter 12 through the opening of the frame part 4 through. Once the electrical assembly 2 in the frame part 14 is inserted, the front cover sheet 6 with the centering holes 24 at the centering nipples 22 of the frame part 4 aligned on this and tightly connected, for example by suitable adhesive, welding, or other adhesion methods. The strip serves as a sealing foil 14 on the anode conductor 10 the connection between the anode conductor 10 and the cover sheet 6 , Finally, the back cover sheet 6 on the rear flat side of the frame part 4 put on, with the centering holes 24 with the depressions 32 in alignment and in the same way as the front cover sheet 6 with the frame part 4 and the cathode conductor 12 connected.

4 shows a perspective view of a galvanic cell 1' according to a second embodiment of the present invention in the assembled state. The galvanic cell 1' The second embodiment is constructed with the cell described above 1 the first embodiment identical to the difference that the current collector 10 . 12 from the shorter narrow sides of the cell 1' extend from instead of the longer narrow sides.

As a third embodiment of the present invention, a cell block will be described below 32 based on the illustration in 5 to 8th be explained. It is 5 an exploded perspective view of components or assemblies of the cell block 34 , is 6 an enlarged view of some assemblies of the cell block 34 from another perspective, is 7 a perspective view of the cell block 34 in the assembled state, and is 8th an enlarged view of a detail VIII in 7 ,

As in 5 shown, is the cell block 34 from ten individual galvanic cells 1 _i to 1 _x of the first embodiment, four screws 36 , eight slices 38 and four nuts 40 composed. Where every even-numbered cell is 1 _ii . 1 _x arranged as shown in the illustration 1 equivalent. That is, in the even-numbered cells 1 _ii to 1 _x is the anode conductor 10 in the drawing above and on the viewer side facing, while the Kathodenableiter 12 in the cell block at the bottom and on the side facing away from the viewer (in the drawing are the cathode arresters at the bottom 12 the even-numbered cells 1 _ii , ..., 1 _x obscured by cells lying in front of it). As against are the odd-numbered cells 1 _i , ..., 1 _ix in a relation to the illustration in 1 arranged rotated by 180 ° about the axis C orientation. That is, in these cells is the cathode conductor 12 in the cell block above and on the side facing away from the viewer of the cells, while the anode conductor 10 in the cell block at the bottom and on the viewer side facing the cells. In this way, there is in each case a cathode arrester 12 an odd-numbered cell, e.g. B. the cell 1 _i , an anode conductor 10 the next even-numbered cell, ie the cell in the selected example 1 _ii , in the stacking direction directly opposite. Between this cathode conductor 10 the even-numbered cell 1 _ii and the cathode conductor 12 the next odd-numbered cell, here the cell 1 _iii , is a distance of about the thickness of two frame parts 4 educated. The cathode conductor 12 the even-numbered cell 1 _ii is the anode conductor of the next odd-numbered cell, in this case the cell 1 _iii , at the bottom of the cell block in the stacking direction directly opposite. Again, there is between this anode conductor 10 the odd cell 1 _iii and the cathode conductor 10 the next even-numbered cell 1 _iv a distance of about the thickness of two frame parts 4 educated. This continues until the last cells 1 _ix . 1 _x , In other words, in the direction of increasing atomic numbers of the cells 1 _i , ..., 1 _x each lie in the stacking direction a Kathodenableiter 12 and an anode conductor 10 directly opposite each other, while between this anode conductor 10 and the next cathode arrester 12 a noticeable distance is formed. It should be noted that at the first cell 1 _i the anode conductor 10 at the front end of the stack 34 accessible while at the last cell 1 _x the cathode conductor 12 at the rear end of the cell stack 34 is accessible.

As can also be seen, extend the screw 36 through the through holes 30 the frame parts 4 and the through holes 24 the cover sheets 6 the individual cells 1 through (see for example the axes F, F 'in 5 ) and are about slices 38 with nuts 40 secured.

Although the present invention with reference to concrete Embodiments described in their essential features It has been understood that the invention is not limited to these embodiments is limited, but in the by the claims given scope and range can be modified.

For example, the cells in the cell block 34 The third embodiment braced by means of screws, washers, and nuts. It is understood that this type of attachment is only an example and about a riveting, possibly via suitable printing plates, is possible. Where a slight disassembly of the cell stack 34 is desired, however, a screw is advantageous, while in applications where it must never come to a release of the connection or tension, an insoluble compound such as riveting described above may be preferred.

The tension of the cell stack via clamping elements, which are through through holes in the frame-shaped sealing seams of the cells 1 extend through, is also only to be understood as an example. Tensioning can also be done via externally applied clips or collars.

Also in 1 illustrated shape of the frame parts 4 is just an example. Essential to the operation of the present invention is that the sealing seam of a pouch cell is like a frame, surrounds the active part of the cell and at least at locations where axial pressure on the cell is expected from the outside, thicker than the active Part is itself.

The structure and shape of the electrical assembly 2 , So the electrode package 8th and the arrester 10 . 12 in 1 . 2 B is only an example and can be adapted to the requirements. The arresters 10 . 12 may also have a different profile, and the number of electrodes 26 . 28 is completely at liberty. Examples of modifications with regard to current conductors 10 . 12 are in 9 to 12 shown.

So can the location of the arrester 10 . 12 be varied according to requirements. It is conceivable, for example, both arresters 10 . 12 to accommodate on one of the narrow sides of the cell, as it is in about 9 or in 10 is shown. This has the advantage that the cells can be placed with the bottom, without the arresters can be damaged. In a cell of a fourth embodiment, as shown in FIG 9 the anode conductor 10 and the cathode conductor 12 arranged on opposite flat sides of the cell, while in a cell of a fifth embodiment as shown in FIG 10 in the middle of the upper narrow side are aligned. The interconnection can then take place via suitably formed contact clips.

A sixth embodiment is in 11 shown. There too, both arresters extend 10 . 12 with its free ends along a narrow side of the electrical module 2 , but in each case over the entire width and in alignment with opposite flat sides. One of the arresters (here the anode conductor 10 ) the entire film stack 8th , The arrangement according to this embodiment has the advantage that by arranging the cells in a stack in a stack, a series connection with directly adjacent current conductors can be realized.

Also in a seventh embodiment as shown in FIG 12 is the interconnection as in the previous embodiment possible, however, a encompassing of the film stack 8th through one of the current conductors 10 . 12 avoided. In this embodiment, two are current conductors 10 . 12 with L-shaped cross-section on the same narrow side of the film stack 8th arranged, wherein respective parts of the film stack 8th facing leg of the L-profiles of the arrester 10 . 12 are unlatched in a toothed manner. It should be noted that the anode conductor 10 is shown in the figure only to illustrate the profile cross section with an outbreak. In fact, the anode conductor is also 10 an uninterrupted profile piece.

An eighth embodiment is in 13 shown. The representation corresponds to that in 3 but it is only the upper half of the frame part 4 shown. In this embodiment, instead of the centering nipples 22 centering 42 provided in drilling 44 are used. The centering sleeves 42 take over the function of the centering nipple 22 and the through hole 30 the first embodiment (see. 3 ), and the holes 44 take over in addition to receiving the centering sleeves 42 the task of depressions 32 the first embodiment. Where a tension of the cells 1 via separate through holes or even over external elements, centering pins can also be used instead of sleeves (not shown in detail).

The fourth to eighth embodiments constitute modifications of the first or second embodiment The explanations regarding the first or second embodiment are, unless they are excluded by the modification, invariably applicable to the fourth to eighth embodiments.

The The present invention is applicable to all types of memory cells Storage and delivery of electrical energy suitable, in particular electrochemical primary and secondary cells of any kind. The invention is particularly preferably based on lithium-ion cells flat design and cell blocks composed thereof be.

A cell block as described above forms, together with terminal poles, with the free current conductors 10 . 12 the first or last cell 1 _i . 1 _x are connected, and an optional housing, a battery or a rechargeable battery, which is used in a vehicle or in other technical applications for the supply of a vehicle electrical system or for an electric drive. Such a battery or accumulator is an electric energy storage device according to the invention.

1, 1'

galvanic cell

2

Electromechanical assembly

4

frame part (Seam portion)

6

cover sheet (Sheet member)

8th

foil package (active part)

10

anode conductor

12

cathode conductor

14

sealing film

16

vertical Rod

18

horizontally Rod

20

notch

22

Zentriernippel

24

centering

26

Anode conductor film

28

Cathode conductor film

30

Through Hole

32

depression

34

cell block

36

cylinder head screw

38

disc

40

mother

42

centering

44

drilling

101

(Was standing the technique: cell stacks)

102

(Was standing technology: cell)

103

(Was standing the technique: contact lug)

105

(Was standing the technique: base plate)

A

central axis in the transverse direction (prior art: anode)

B

central axis in the vertical direction

C

horizontal Central axis in the longitudinal direction

D D '

horizontal axes in lateral direction 24

e

vertical axis through 24

F, F '

horizontal axes in the longitudinal direction 22 . 24

i ..., x

Index for 1

II

level B-C

III

level E-F / F '

K

(Was standing the technique: cathode)

t

Thickness above everything 2

T

Thickness above everything 4

QUOTES INCLUDE IN THE DESCRIPTION

This list The documents listed by the applicant have been automated generated and is solely for better information recorded by the reader. The list is not part of the German Patent or utility model application. The DPMA takes over no liability for any errors or omissions.

Cited patent literature

• EP 1475852 A1 [0005]
• - EP 1562242 A2 [0006]
• WO 2008/128764 A1 [0007, 0007]
• JP 07-282841 A [0007]

Cited non-patent literature

• - "Primary and Rechargeable Lithium Batteries" for the practical course Inorganic-Chemical Technology of the TU Graz by Dr. med. K. -C Moeller and dr. M. Winter, February 2005 [0004]

Claims (35)

An electric energy storage cell having an active part adapted and adapted to store externally supplied electrical energy and to dispense stored electrical energy to the outside; at least two current conductors connected to the active part and arranged and adapted for supplying electric power from the outside to the active part and for outputting electric current discharged from the active part to the outside; and an envelope, which describes a prismatic basic shape of substantially parallelepiped outline and the active part gas-tight and liquid-tight, wherein the extension of the prismatic basic shape of the cell in the thickness direction is substantially smaller than the extension in the two remaining spatial directions, and preferably Expansion in one of the two remaining spatial directions greater than in the other of the two remaining spatial directions, characterized in that the envelope has two flat film parts and a circumferential, connecting the edges of the film parts seam part, wherein the seam part surrounds the active part like a frame and sections largest Has thickness in which the thickness is uniformly greater than the thickness of the active part even under mechanical pressure. Electric energy storage cell according to claim 1, characterized characterized in that the two film parts at least in the sections largest thickness on opposite Flat sides of the seam surface lie flat and with these are tightly connected. Electric energy storage cell according to claim 2, characterized characterized in that the seam part extending in the thickness direction Through holes in sections of greatest thickness has and the film parts aligned with the through holes Have holes. An electric energy storage cell according to claim 3, further characterized by pods extending over a Part of the length of the through holes extend in this and projecting from one side of the suture, preferably the supernatant of the sleeves and those in the through holes released length greater than twice Thickness of the foils and less than half of the largest Thickness of the seam plus the thickness of the films are. Electric energy storage cell according to claim 2, characterized characterized in that the seam part in the thickness direction protruding elevations having, on the opposite side a survey of a survey in shape and size corresponding and aligned with this in the thickness direction depression is provided, and the film parts with the elevations or depressions have aligned holes of appropriate shape and extent, preferably the height of the elevations and the depth the depressions are greater than twice the thickness the slides and less than half of the largest Thickness of the seam plus the thickness of the films are. Electric energy storage cell according to claim 5, characterized characterized in that the seam part extending in the thickness direction Through holes in sections of greatest thickness has and the film parts aligned with the through holes Have holes. Electric energy storage cell according to claim 6, characterized characterized in that the through holes are aligned centrally with the surveys are provided. Electric energy storage cell according to one of the preceding Claims, characterized in that the current conductors each have a flat profile and of the enclosure protrude away. Electric energy storage cell according to claim 8, characterized characterized in that the current conductors parallel to the flat sides the prismatic basic shape defined by the cladding protrude. Electric energy storage cell according to claim 9, characterized characterized in that the current conductors are located opposite each other Flat sides of the prismatic ones defined by the cladding Extend basic shape adjacent. Electric energy storage cell according to one of the claims 8 to 10, characterized in that the current conductors from opposite Narrow sides of the prismatic areas defined by the cladding Protrude basic form. Electric energy storage cell according to claim 11, characterized characterized in that the prismatic structure is two opposite Having pairs of narrow sides of different lengths and the current conductors from the longer pair of narrow sides protrude. An electric energy storage cell according to claim 11 or 12, characterized in that the extension of the first and the second current arrester along the narrow sides, from which they more than half of the Length of these narrow sides is. Electric energy storage cell according to one of claims 8 to 13, characterized in that the current conductors each extend between the seam part and one of the foils and are tightly connected thereto. Electric energy storage cell according to claim 14, characterized characterized in that the current collector has an L-shaped profile have one leg on a narrow side of the active Partly rests and the other leg between the seam part and one of the foils extends therethrough. An electric energy storage cell according to claim 14 or 15, characterized in that the seam part of the shape and size the current conductor has adapted notches. Electric energy storage cell according to one of the preceding Claims, characterized in that the storage and delivering the electrical energy through respective electrochemical Reactions take place. Electric energy storage cell according to claim 17, characterized characterized in that it is a galvanic cell, in particular a galvanic secondary cell is. An electric energy storage cell according to claim 17 or 18, characterized in that the active part is a plurality of Having electrodes of two types, each having an electrode of a first type by a separation layer of the electrode of a second Art is separated, wherein the electrodes of the first kind and the electrodes the second type each with each other and with one of the current collector are connected. Electric energy storage cell according to claim 19, characterized characterized in that each electrode is a laminate which at least two layers of a chemically active material and at least one layer an electrically conductive material and with an electrolyte material is impregnated, wherein the at least one layer of the electrically conductive material of a greater length as the layers of the respective chemically active material and protruding on one side of the laminate, the laminates the electrodes with separating layers in between so are arranged and preferably laminated, that the layers electrically conductive Material of the electrodes of a kind on one side protrude and there are connected to each other, the one side on which the layers of electrically conductive material of the electrodes of the other Protrude and are interconnected, longitudinally opposite. Electric energy storage cell according to claim 20, characterized characterized in that the chemically active material of at least one the electrodes have a lithium compound. An electric energy storage cell according to claim 20 or 21, characterized in that the chemically active material at least one of the electrodes comprises graphite. Electric energy storage cell according to one of the claims 20 to 22, characterized in that the separating layer is an electrolyte material having. Electric energy storage cell according to one of the preceding Claims, characterized in that the active part is evacuated. Cell block consisting of a plurality of electric energy storage cells according to any one of the preceding claims, wherein the cells len are stacked in the direction of their thickness, and preferably at least in areas that are the largest thickness sections of the Match seam part, resting on each other. Cell block according to claim 25, characterized that the cells are clamped together in the stacking direction to pressure are. A cell block according to claim 26 when dependent on claim 3, 6 or 7 depending back, characterized in that the Tensioning of the cells is done by means of tension rods, which themselves extend through the through holes of all cells. A cell block according to claim 27 when dependent on claim 4 rear-related, characterized in that the tension rods extend through the sleeves. A cell block according to any one of claims 25 to 28, as far as dependent on claim 4, characterized that each of a cell excellent part of a sleeve in the released part of a through hole of the suture an adjacent cell extends. A cell block according to any one of claims 25 to 28, as far as dependent on claim 5 or 7, characterized that in each case a survey of the seam of a cell in a Countersinking of the seam of an adjacent cell extends. A cell block according to any one of claims 25 to 30, characterized in that in each case a current conductor of a cell connected to a current collector of an adjacent cell and, as far as the cell is not the first or last cell of the cell block is the other current conductor of the cell with a current conductor connected to another adjacent cell. Cell block according to claim 31, characterized in that always current divider unterschiedli polarity are interconnected. A cell block according to claim 31 or 32 when dependent on claim 10 back related, characterized in that always Current arrester on the flat side, to which they are adjacent, in the stacking direction of the cell block opposite. Electric energy storage device containing a A cell block according to any one of claims 25 to 33 and a first pole, with a free current collector of the first electric energy storage cells connected, and a second pole, with a free current collector the last of the electric energy storage cells is connected. Vehicle with an electric energy storage device according to claim 34.